<!doctype html> 
<html> 
<head> 
    <meta charset="utf-8"> 
    <title></title> 
</head>
<body>
<script type="text/javascript">
	
	var json = {
		a:function(){
			return this;
		}
	};
	json.b = json.a();
	alert(json.b.b.b.b.b.a);
</script>
</body>
</html>